So the little leading man would have been more delighted than anyone when his mum scooped the Best Actress award for her role in Blue Jasmine.
When she was announced the winner, the Australian actress gave her nine-year-old – one of three sons – a huge hug which he happily returned before joining in with the rest of the hall and clapping excitedly.
When she took to the stage, dressed in a stunning dark green floor-length Lanvin gown, Cate accepted the award and thanked Blue Jasmine director Woody Allen, 'for everything he's done.'
She went on to say: 'Not only for cinema but for the roles he's created for women. I'm just the lucky girl he happened to call for this.'
The actress also thanked her husband and sons. “I want to thank my husband who is my partner in absolutely everything for his incredible support. And my three sons, Roman who is here, doing magic tricks for everyone, thank you, for the boys, for being there, for making everything normal in the best possible way, and for that I am eternally grateful.
She rounded off the speech with a joke directed at her son who was sitting at the VIP table: 'And you should be grateful that it is I, not Jasmine French, that is your mother.'
Lucky Roman was spotted mingling with the stars, posing for photographs with his mum and Sanda Bullock, who he was particularly delighted to meet, and it seems, show magic tricks to.